The lung microbiome in moderate and severe chronic obstructive pulmonary disease
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Study information
-
Quality control
- Retracted paper
- Contamination issues suspected
- Batch effect issues suspected
- Uncontrolled confounding suspected
- Results are suspect (various reasons)
- Tags applied
study design
Citation
PMID PubMed identifier for scientific articles.
DOI Digital object identifier for electronic documents.
URI
Authors
Pragman AA, Kim HB, Reilly CS, Wendt C, Isaacson RE
Journal
PloS one
Year
2012
Chronic obstructive pulmonary disease (COPD) is an inflammatory disorder characterized by incompletely reversible airflow obstruction. Bacterial infection of the lower respiratory tract contributes to approximately 50% of COPD exacerbations. Even during periods of stable lung function, the lung harbors a community of bacteria, termed the microbiome. The role of the lung microbiome in the pathogenesis of COPD remains unknown. The COPD lung microbiome, like the healthy lung microbiome, appears to reflect microaspiration of oral microflora. Here we describe the COPD lung microbiome of 22 patients with Moderate or Severe COPD compared to 10 healthy control patients. The composition of the lung microbiomes was determined using 454 pyrosequencing of 16S rDNA found in bronchoalveolar lavage fluid. Sequences were analyzed using mothur, Ribosomal Database Project, Fast UniFrac, and Metastats. Our results showed a significant increase in microbial diversity with the development of COPD. The main phyla in all samples were Actinobacteria, Firmicutes, and Proteobacteria. Principal coordinate analyses demonstrated separation of control and COPD samples, but samples did not cluster based on disease severity. However, samples did cluster based on the use of inhaled corticosteroids and inhaled bronchodilators. Metastats analyses demonstrated an increased abundance of several oral bacteria in COPD samples.
Experiment 1
Reviewed Marked as Reviewed by Shaimaa Elsafoury on 2021/02/09
Subjects
- Location of subjects
- United States of America
- Host species Species from which microbiome was sampled. Contact us to have more species added.
- Homo sapiens
- Body site Anatomical site where microbial samples were extracted from according to the Uber Anatomy Ontology
- Lung Pulmo,Lung,lung
- Condition The experimental condition / phenotype studied according to the Experimental Factor Ontology
- Chronic obstructive pulmonary disease Airflow Obstruction, Chronic,Airflow Obstructions, Chronic,CAFL - Chronic airflow limitation,CAL - Chronic airflow limitation,CAO - Chronic airflow obstruction,Chronic airflow limitation,Chronic Airflow Obstruction,Chronic Airflow Obstructions,Chronic airway disease,Chronic airway obstruction,chronic airway obstruction, NEC in ICD9CM_2006,chronic airway obstruction, not elsewhere classified,Chronic irreversible airway obstruction,CHRONIC OBSTRUCTIVE AIRWAY DIS,chronic obstructive airway disease,Chronic Obstructive Airways Disease,chronic obstructive airways disease,chronic obstructive airways disease NOS,chronic obstructive airways disease NOS (disorder),CHRONIC OBSTRUCTIVE LUNG DIS,Chronic Obstructive Lung Disease,chronic obstructive lung disease,chronic obstructive lung disease (disorder),chronic obstructive lung disease [Ambiguous],Chronic obstructive lung disease, NEC,Chronic obstructive lung disease, NOS,CHRONIC OBSTRUCTIVE PULM DIS,chronic obstructive pulmonary disease,Chronic Obstructive Pulmonary Disease (COPD),chronic obstructive pulmonary disease (COPD),chronic obstructive pulmonary disease and allied conditions,Chronic obstructive pulmonary disease finding,Chronic obstructive pulmonary disease finding (finding),Chronic obstructive pulmonary disease NOS,CHRONIC OBSTRUCTIVE PULMONARY DISEASE, (COPD),chronic obstructive pulmonary disease, (COPD),COAD,COAD - Chronic obstructive airways disease,COLD,cold,COLD (chronic obstructive lung disease),cold (chronic obstructive lung disease),COLD - Chronic obstructive lung disease,COPD,COPD - Chronic obstructive pulmonary disease,COPD NOS,COPD, CHRONIC OBSTRUCTIVE PULMONARY DISEASE,COPD, chronic obstructive pulmonary disease,DISEASE (COPD), CHRONIC OBSTRUCTIVE,disease (COPD), chronic obstructive,Dops,obstructive lung disease, chronic,OBSTRUCTIVE PULMONARY DISEASE (COPD), CHRONIC,obstructive pulmonary disease (COPD), chronic,PULM DIS CHRONIC OBSTRUCTIVE,PULMONARY DISEASE (COPD), CHRONIC OBSTRUCTIVE,pulmonary disease (COPD), chronic obstructive,Pulmonary Disease, Chronic Obstructive,Chronic obstructive pulmonary disease
- Group 0 name Corresponds to the control (unexposed) group for case-control studies
- controls
- Group 1 name Corresponds to the case (exposed) group for case-control studies
- Chronic obstructive pulmonary disease
- Group 1 definition Diagnostic criteria applied to define the specific condition / phenotype represented in the case (exposed) group
- Patients who have Chronic obstructive pulmonary disease
- Group 0 sample size Number of subjects in the control (unexposed) group
- 10
- Group 1 sample size Number of subjects in the case (exposed) group
- 22
- Antibiotics exclusion Number of days without antibiotics usage (if applicable) and other antibiotics-related criteria used to exclude participants (if any)
- 2 months
Lab analysis
- Sequencing type
- 16S
- 16S variable region One or more hypervariable region(s) of the bacterial 16S gene
- V3
- Sequencing platform Manufacturer and experimental platform used for quantifying microbial abundance
- Roche454
Statistical Analysis
- Data transformation Data transformation applied to microbial abundance measurements prior to differential abundance testing (if any).
- relative abundances
- Statistical test
- Mann-Whitney (Wilcoxon)
- Significance threshold p-value or FDR threshold used for differential abundance testing (if any)
- 0.1
- MHT correction Have statistical tests be corrected for multiple hypothesis testing (MHT)?
- Yes
- Confounders controlled for Confounding factors that have been accounted for by stratification or model adjustment
- age
Alpha Diversity
- Shannon Estimator of species richness and species evenness: more weight on species richness
- unchanged
- Simpson Estimator of species richness and species evenness: more weight on species evenness
- unchanged
Signature 1
Reviewed Marked as Reviewed by Fatima on 2021/07/16
Source: Table 2
Description: Metastats Analysis of Differential Abundance of moderate and severe COPD Lung microbiome compared to controls
Abundance in Group 1: increased abundance in Chronic obstructive pulmonary disease
Signature 2
Reviewed Marked as Reviewed by Shaimaa Elsafoury on 2021/02/09
Source: Table 2
Description: Metastats Analysis of Differential Abundance of moderate and severe COPD Lung microbiome compared to controls
Abundance in Group 1: decreased abundance in Chronic obstructive pulmonary disease
| NCBI | Quality Control | Links |
|---|---|---|
| Clostridium | ||
| Candidatus Blastococcus massiliensis | ||
| Modestobacter | ||
| Nakamurellaceae | ||
| Thermoactinomyces | ||
| Thermoactinomycetaceae | ||
| Citrobacter | ||
| Arthrobacter |
Revision editor(s): WikiWorks
Experiment 2
Reviewed Marked as Reviewed by Shaimaa Elsafoury on 2021/02/09
Differences from previous experiment shown
Subjects
- Group 0 name Corresponds to the control (unexposed) group for case-control studies
- moderate Chronic obstructive pulmonary disease
- Group 1 name Corresponds to the case (exposed) group for case-control studies
- Severe
- Group 1 definition Diagnostic criteria applied to define the specific condition / phenotype represented in the case (exposed) group
- Patients who have severe Chronic obstructive pulmonary disease
- Group 0 sample size Number of subjects in the control (unexposed) group
- 8
- Group 1 sample size Number of subjects in the case (exposed) group
- 14
Lab analysis
Statistical Analysis
Alpha Diversity
- Shannon Estimator of species richness and species evenness: more weight on species richness
- unchanged
- Simpson Estimator of species richness and species evenness: more weight on species evenness
- unchanged
Signature 1
Reviewed Marked as Reviewed by Shaimaa Elsafoury on 2021/02/09
Source: Table 2
Description: Metastats Analysis of Differential Abundance of moderate and severe COPD Lung microbiome compared to controls
Abundance in Group 1: increased abundance in Severe
| NCBI | Quality Control | Links |
|---|---|---|
| Aeromonadales | ||
| Desulfobacterales | ||
| Aeromonadaceae | ||
| Desulfobulbaceae | ||
| Nocardioides | ||
| Pontibacillus | ||
| Clostridium | ||
| Microvirga | ||
| Aeromonas |
Revision editor(s): WikiWorks
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